Thermostatic valve.



P. W. R0BERTS'HAW1 THERMOSTATIO VALVE.

APPLIOATION FILED JULY 15, 1909.

986,760. Patented Mar.14, 1911.

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' rnn'nnmcx 7w." nonnnrsrmw, or rrr'rsnnne, PENNSYLVANIA.

.rimniro's'rerro vALvn.

. To all whom it concern:

' Be in known that I, FREDERICK \V. Ronlennsylvania',-hav invented a newand useful Thermostatic Valve, of whlch the following is a full. clear,and exact. descriptl'on, reference being had to the accm panyingdrawings, for ming part of this speclficatlon. m wlnch.

Figure 1 is a longitudinal section of one formof valve embodying myinvention; I and F 1g. 2 1s a cross-sect1onfon thehne 11-41 of Fig. 1.

stem. Hcretoforein thciconstruction of this type of valves; it has beenexceedingly dif: ficult to prevent, leakage. of gas aroundthe valvestem; and the jprovislon :of stuffing boxes desi ied to prevent suchleakage has rcsulted in such an amount of friction upon the valve-stemas to seriously interfere with of novel character for transmitting the.

the accuracy of-operation; the friction produced being sufficienttoamaterially affect;- -the temperature at which the valve wil operate.My invention is designed to provide a valve havinga self-packing stemwhich will be practically frictionless.-

A further object of my inventionis to provide. means of novel characterfor adjusting the action of thevalve. which shall be readily accessiblewithout disconnecting or disturbinganypf the parts.

A still further objectis to provide means movements 6f th thermostaticelements to the valve.

Theprecise nature of myinvention will be best understood by reference tothe drawing; in which I-havc shown the: preferred embodiment thereof.and'whieh' will I ment of theparts without departing from the spirit andscope of my invention as defined in the appended claims.

' Inthesedrawings, the numeral 2 designatcs the valve casing or shell.which is.pro-

- vided' with, the inlet connection 3 and the outlet. connection 4,these connections be 111g arranged to commumcate with. each vSpecification of Letters Patent; Patented B131. 14, 1911. Applicationfiled July 15, 1909; Serial No. 507,727. i i

othenthrough an iuteri orport 5 controlled by. the valve (5..Thevalve'ti is provided with the outwardly projecting stem 7, which isguided in a boss 8 on the outer side of the screw cap 9 which closes theopening in thccnd of the valve casing through which the valve isintroduced. A compression spring 10 is seatedbetw'ecn the outer side ofthe valve and the innenface of the cap, said spring normally acting inthe directionto seat the 'valve. On its inner side the valve is providedwith-a shortstem 11 .which contacts with the in'ncn-end of a pin or stud12. which extends into the valve casing and which is loosely scatedinthe wall 13 of said casing opposite the cap or cover 9. .This pin orstud is provided-with a plurality of circumferential corrugations 14,each of which has the outwardly facing shoulder .15 at its base. I havediscovered thatby providing this pin with these corrugations and byfilling the same with lubricantsthe pin ,is made practicallv selfpackingso thatthe leakage of gas around the stem is prevented. This is not onlya great advantage in simplifying the. construction and doing away withspecially provided packing, but it also renders the pin practicallyfrictionless, thereby enabling the valve to-operatc accurately. Theouter end of this pin projects'in a position for contact with the head16 of an'adjusting screw 17. which is seated in a centrally arrangedmultiplying lever 18. 19 isa second multiplying lever havinga projection20 which contacts with the lever 18. The lever 19 is engaged by theinner rod 21.01 the thermostat 22.; This thermostat is of a well knowntype. consisting preferably of an outer metallic. tube and an innercarbon rod 21. which transmits" the thermostatic movements of saidtubeto the levers 19 and 18, and thereby to thepin 15, and thence to thevalve 10. To provide'support' for the levers 18 and 19, the casing isprovided avith' the two posts or projections 23,-the lever 18 heingjpivoted in a slot 24 in one of said posts or' projections. and the lever19 being similarly pivoted in the slot 25 of the other post orprojection. .These posts or'projections are connected at their outerends by a bridge26 provided .with a threaded aperture to receivethethreaded coupling.' 27 of the thermostat. The space between the twopostsor projections is entirely open and c onve n ient access to thehead of the adjusting screwfor the purposes of adjustment. This screw isclamped in its adjusted positionlby means ofla set-screw 28 whichengages the split inner end'of the lever 18. P, As will be readily seen,the 'user'can readily adjustthe valve to operate at any,-.de-,

1 o sired ten'iperature without taking the valve I and without shutting0 to pieces or disconnectingt any of.the parts,

through the valve.

The pin or-stud may, if desired, be

15 formed of one piece with the stem '11 of the valve. 'I prefer,however, to form it in a separate piece, since the break in the valvestem thus forined enables the parts to more readily a'dapt themselves toslight difi'er- 2 0 ences of alinement'. That is to say, a slightdifference in exact centering of the pin or stud 15 and the centering ofthe guide stem 7 .of-the valve will not interfere with the '25the-number oi corrugations in of self-packing provided may be increasedto By' increasing D this separable member of the valve stem,' and byelongating'its bearing in the casing wall,'the degree proper seatin ofthe valve.

.any desired extent according to the pressure employed. e v

-What I claim is i I 1 1. In valve .mechanism of the'.'cl1aracterdescribedga valve casing, a valve member the flow of gastherein, a-valve stem projecting e'xteriorl'yof the casing, and a guidefor said SlCIll,-S211Cl stem beingdivided transversely into separatepieces, the piece which is attached-to;

the valve being relatively shortandextemh ing but a short distance intothe guide,- and -whereby the valve may adjust itself-4o its seat,notwithsta nding variations in the relation of'the axes ofthe valve andstem, and

a.thermostatic device arranged to; exert pushing action against theouter end of the other stem section andat least one of said pieceshaving corrugations thereonwithin said guide, "said corrugationsconstituting the packing means for the-stoma; substantially asdescribed, 1

Hu -2. In valve mechanism of the character described, a valve casing,-avalve member therein, a valve stem projectingexteriorly of the casing,the casing having a guide for the said stem, a nd the-stem havinga-series' ;of circumferential corrugationsnvithin' the 7 guide, saidcorrugations consisting ofa suc- 'CGSSIOII of tapered portionsterminating in 'shoulders'together with a thermostatic. de-

therein, the casing having a removable cap at one side of the valve anda guide sleeve at-the opposite side of the valve, and the valve havingoppositely projecting stems one of which is guided in the cap and theother of which seats in the guide sleeve, the stem E'haviug a jointwithin the sleevetogether with a thermostatic device arranged to actupon the outer end of the stem; substantially as described. g '4. Invalve mechanism of the character i described, a casing or shell, a valvetherein. "having a stem projecting exteriorly"of the to the end of-the'stem, oneflof said l'evers having an ad usting screw ad ustablysctacting with the valve stem, and a thermostatic element arranged toact it on the other lever; substantiallyas described.

Q5; In valve niechanism of 'tliecharacter described, a casing or shell,11 valve therein having a stem projecting exteriorly of the casing orshellgmultiplylng levers ad acent tacting "with. the'valve stem', 'andathermostatlcelement arranged :'=toact upon' the are pivoted," saidposts or projections having a free opening between them to 'giveaccesstozthe levers and "adjusting screw; substan- ;tiall v asfdescribed. f

6. In valve meehanismeoi t a valve member adapted to said seat, and a.

=extends, said stein being .divided transversely within the guide intotwo sections, the jointbetwceu said sections being near the inner'end.ofthe guide, ,and' forming .-to its seat, and a thermostatic elementarranged to exert a push action against the outer end-of the longersection of said stem, substantially as described. V

In testimony whereofgI have hereunto set myhund.

FREDERICK W. ROBERTSIILW. Witnessesz- 1 II. ll'Ll-Comvm,

, Geo. H. PAnMnLnn.

other lever, the casing'or she'llhayin opposite posts or. projections inwhich sai levers described, a valve .casing,a valve seated casing orshell, multiplying levers adjacent cured therein, the head of said screwcon-.

to the end of the stem, one of said levers" having a l-adjustingscrewadjustably secured therein, -t-he-;head'i of said screw conhecharacter l V described, a valve casmghavnig a valve seat,

guide within'wl1ich-the stem of the valve means to permit-the valve 'to'adjust itself

